3519/630 Double Row Tapered Roller Bearing | 630×820×242mm | 10979/630 | Heavy-Duty Gearbox, Rolling Mill & Mining Applications

Technical Specifications

Product Overview

The 3519/630 / 10979/630 is a metric large-bore double row tapered roller bearing with a 630mm bore, 820mm OD, and 242mm width, weighing 368kg per unit. Positioned directly below the 3519/670 (416kg) in the NKS 3519 series, the 3519/630 serves the critical 630mm shaft diameter class — one of the most widely encountered bore sizes in large industrial gearboxes, rolling mill pinion stands, and mining crusher drive systems worldwide.

The 3519/630 is primarily used in heavy-duty applications such as gearboxes, rolling mills, mining machinery, and hoisting equipment — where the bearing must simultaneously withstand high radial loads and bidirectional axial loads with maximum structural rigidity. Its double-row tapered roller geometry — a double cup, two cones, and optional spacer — distributes load across the full roller-to-raceway line contact, maximizing fatigue life and resistance to edge stress under the misalignment conditions inherent in heavy rotating equipment.

The 3519/630 is cross-referenced as 10979/630 — both designations refer to the identical bearing. NEXANS Bearing manufactures this bearing from GCr15 chrome steel (AISI 52100 / 100Cr16 / SUJ2 / 683/XVIII / SKF3 equivalent) — the same alloy specification used by TIMKEN, FAG, NSK, and NTN for this bearing class — with full dimensional and load rating inspection conducted at our facility in Liaocheng, Shandong, China before every shipment.

Key Application Industries

The 3519/630 is specifically identified for heavy-duty applications including gearboxes, rolling mills, and mining machinery — withstanding bidirectional axial loads with high radial load capacity and high rigidity.

3519/630 vs Adjacent Series Members — Direct Comparison

Notably, the 3519/630 has a wider cross-section (242mm) than the 3519/670 (240mm) despite its smaller bore — reflecting the specific load geometry and roller complement optimized for the 630mm bore class. This makes the 3519/630 a distinct engineering specification, not simply a scaled-down 3519/670.

3519 Complete Series — Range Overview

The 3519/630 occupies the pre-entry large-bore position — the last step before the 3519/670 series entry. For equipment designed around a 600mm shaft, see the NKS 3519/600 listing; for 670mm shafts, see the NEXANS Bearing 3519/670 listing.

Load & Performance Data

Double row tapered roller bearings deliver high load carrying capacity, axial load support in both directions, and high stiffness — the three defining performance attributes for the 3519/630 in gearbox, rolling mill, and mining applications.

Why Source the 3519/630 from NEXANS Bearing?

✅ 630mm Bore Class — Verified Stock & Production Access

The 630mm bore class is a critical size in large industrial gearboxes and rolling mill pinion stands — NEXANS Bearing maintains verified production access and stock capability at this bore size, sourced from China's top-tier large bearing factories. Every 368kg unit undergoes full dimensional inspection and load rating verification before shipment.

✅ Unique Cross-Section Geometry — 242mm Width

The 3519/630's 242mm width is wider than the adjacent 3519/670 (240mm) — a deliberate engineering choice reflecting the specific roller complement and contact geometry optimized for the 630mm bore class. NEXANS Bearing supplies the exact OEM specification, ensuring compatibility with your equipment housing dimensions.

✅ High Rigidity for Precision Gearbox Applications

The double-row tapered roller construction provides high stiffness — a critical requirement for large industrial gearboxes where shaft deflection under load must be minimized to maintain gear mesh accuracy and prevent premature gear wear.

✅ Full Material Grade Flexibility

Available in GCr15 / AISI 52100 / 100Cr16 / SUJ2 / 683/XVIII / SKF3 chrome steel grades — covering all major international material standards. Carburized steel options available for applications requiring enhanced surface hardness and case depth.

✅ Complete Precision & Clearance Range

All ABEC grades (1, 3, 5, 7, 9) and DIN620 precision classes (P0, P6, P5, P4, P2) available, combined with all standard clearance classes (C0 through C5). NKS supplies the exact specification required by your OEM equipment manual.

✅ 30+ Years of Heavy Industry Bearing Supply

Since 1992, NKS has supplied large-bore industrial bearings to distributors and end-users across Russia, Eastern Europe, the Middle East, and Southeast Asia — markets with significant rolling mill, mining, and heavy process industry infrastructure.

✅ Full OEM & Private Label Manufacturing

Custom packaging design, laser-etched logo engraving directly on the bearing ring, and fully branded inner/outer packaging. All tooling and IP rights belong exclusively to you. Contact NKS for MOQ and pricing on custom-branded 3519/630 supply.

OEM & Private Label Service — FAQ

Q1: Can NEXANS Bearing supply the 3519/630 under my own brand?

Yes. NEXANS Bearing provides complete private-label services: custom box artwork, laser engraving of your brand on the bearing ring, and fully branded inner/outer packaging. All design files and IP rights belong exclusively to you. Contact us for MOQ and lead time details.

Q2: What is the minimum order quantity (MOQ)?

MOQ is 1 piece for standard stock items. For custom-branded or special-configuration orders, MOQ is negotiated individually. Sample orders are accepted for quality evaluation before bulk commitment.

Q3: What is the difference between 3519/630 and 10979/630?

Both designations refer to the identical bearing — 630×820×242mm double row tapered roller bearing. 3519/630 is the Chinese GB/ISO standard designation; 10979/630 is an alternative cross-reference designation used by some manufacturers and distributors. NEXANS Bearing lists both for search and procurement convenience.

Q4: Why is the 3519/630 width (242mm) greater than the 3519/670 (240mm)?

This reflects the specific internal geometry — roller length, roller count, and contact angle — optimized independently for each bore size in the 3519 series. The 3519/630's 242mm width provides the roller complement required to achieve the 41,000N / 51,000N load ratings at the 630mm bore class. This is a critical dimensional difference: the 3519/630 cannot be substituted with a 3519/670 in a 630mm housing, and vice versa. Always verify bore, OD, and width against your equipment drawing before ordering.

Q5: What is the internal construction of the 3519/630?

The 3519/630 consists of: one double cup (outer ring with two raceways), two cones (inner rings with tapered roller and cage assemblies), and an optional spacer between the two cone assemblies. This separable construction allows field assembly and disassembly without specialized tools — a significant maintenance advantage for large equipment where in-situ bearing replacement is required.

Q6: What applications specifically require the 3519/630 vs the 3519/600?

The 3519/630 (630mm bore, 820mm OD, 242mm width) vs 3519/600 (600mm bore, 800mm OD, 205mm width):

• Bore: 630mm vs 600mm — determined exclusively by shaft diameter; not interchangeable

• Width: 242mm vs 205mm — the 3519/630 is 37mm wider, providing a significantly larger roller complement and higher load capacity per unit width

• Application: The 3519/630's wider cross-section makes it the preferred choice where housing length permits and maximum load capacity at the 630mm bore class is required

Q7: What precision grade is required for large gearbox applications?

For large industrial gearbox applications, P6 / ABEC-3 is the standard minimum precision grade — ensuring adequate dimensional accuracy for gear mesh alignment and smooth low-noise operation. For high-precision or high-speed reducers, P5 / ABEC-5 may be specified. For rolling mill applications, P0 / ABEC-1 is typically sufficient. Always confirm with your OEM equipment manual.

Q8: What shipping terms and lead times apply to the 3519/630?

For stock items: 5–7 business days. For made-to-order or special-configuration units: lead time confirmed at order placement. NEXANS Bearing supports FOB Qingdao, CIF, and EXW Incoterms. Given the 368kg unit weight, NEXANS Bearing provides full wooden crating, sea freight logistics coordination, and heavy-lift handling documentation as standard.

Related Products

Request a Quote

Ready to source the 3519/630 bearing for your project or distribution network?

• Website: www.nksbearing.com

• Email: export@nksbearing.com

• WhatsApp: +86-155-6283-9480

• Location: Liaocheng, Shandong, China

Nexans Bearings  — Your Reliable Bearing Partner Since 1992.